Battery charger



FIG. 1 is a front elevational view of a battery charger showing our new design;

FIG. 2 is a rear elevational view of the battery charger shown in FIG. 1;

FIG. 3 is a left side elevational view of the battery charger shown in FIG. 1;

FIG. 4 is a right side elevational view of the battery charger shown in FIG. 1;

FIG. 5 is a top plan view of the battery charger shown in FIG. 1;

FIG. 6 is a bottom plan view of the battery charger shown in FIG. 1; and,

FIG. 7 is a perspective view of the battery charger shown in FIG. 1. 

What is claimed is the ornamental design for a battery charger, as shown and described. 